520664424466025 has 24 divisors (see below), whose sum is σ = 737868949745664. Its totient is φ = 357020705059200.

The previous prime is 520664424466013. The next prime is 520664424466033.

520664424466025 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-520664424466025 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16459241 + ... + 36224790.

It is an arithmetic number, because the mean of its divisors is an integer number (30744539572736).

Almost surely, 2^{520664424466025} is an apocalyptic number.

It is an amenable number.

520664424466025 is a deficient number, since it is larger than the sum of its proper divisors (217204525279639).

520664424466025 is a wasteful number, since it uses less digits than its factorization.

520664424466025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52740521 (or 52740516 counting only the distinct ones).

The product of its (nonzero) digits is 66355200, while the sum is 56.

The spelling of 520664424466025 in words is "five hundred twenty trillion, six hundred sixty-four billion, four hundred twenty-four million, four hundred sixty-six thousand, twenty-five".